================================================================== BUG: KASAN: slab-out-of-bounds in udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 Write of size 165 at addr ffff888078af0a5a by task syz-executor.1/10619 CPU: 1 PID: 10619 Comm: syz-executor.1 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x1f0 mm/kasan/report.c:433 kasan_report+0xc3/0xf0 mm/kasan/report.c:495 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253 udf_lookup+0xef/0x340 fs/udf/namei.c:309 __lookup_slow+0x266/0x3a0 fs/namei.c:1685 lookup_slow+0x53/0x70 fs/namei.c:1702 walk_component+0x2e1/0x410 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x17d/0x450 fs/namei.c:2474 filename_lookup+0x274/0x650 fs/namei.c:2503 user_path_at_empty+0x40/0x1a0 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3380 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x296/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa47b48b5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa47c6de168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa47b5abf80 RCX: 00007fa47b48b5a9 RDX: 0000000020000180 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007fa47b4e6580 R08: 00000000200002c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc54e1de7f R14: 00007fa47c6de300 R15: 0000000000022000 Allocated by task 10619: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc+0xcd/0x100 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x97/0x310 mm/slub.c:3289 kmalloc include/linux/slab.h:600 [inline] udf_find_entry+0x7b6/0x14f0 fs/udf/namei.c:243 udf_lookup+0xef/0x340 fs/udf/namei.c:309 __lookup_slow+0x266/0x3a0 fs/namei.c:1685 lookup_slow+0x53/0x70 fs/namei.c:1702 walk_component+0x2e1/0x410 fs/namei.c:1993 lookup_last fs/namei.c:2450 [inline] path_lookupat+0x17d/0x450 fs/namei.c:2474 filename_lookup+0x274/0x650 fs/namei.c:2503 user_path_at_empty+0x40/0x1a0 fs/namei.c:2876 user_path_at include/linux/namei.h:57 [inline] do_mount fs/namespace.c:3380 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x296/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x970 kernel/rcu/tree.c:2796 fib_create_info+0x18d0/0x2410 net/ipv4/fib_semantics.c:1580 fib_table_insert+0x1e5/0x1f50 net/ipv4/fib_trie.c:1236 fib_magic+0x451/0x650 net/ipv4/fib_frontend.c:1098 fib_add_ifaddr+0x143/0x5c0 net/ipv4/fib_frontend.c:1120 fib_netdev_event+0x628/0x740 net/ipv4/fib_frontend.c:1480 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 __dev_notify_flags+0x2ef/0x5d0 dev_change_flags+0xe3/0x190 net/core/dev.c:8615 do_setlink+0xef5/0x3d40 net/core/rtnetlink.c:2788 __rtnl_newlink net/core/rtnetlink.c:3547 [inline] rtnl_newlink+0x1748/0x1fa0 net/core/rtnetlink.c:3594 rtnetlink_rcv_msg+0x772/0xe60 net/core/rtnetlink.c:6091 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2540 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x46e/0x5f0 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2125 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888078af0a00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 90 bytes inside of 256-byte region [ffff888078af0a00, ffff888078af0b00) The buggy address belongs to the physical page: page:ffffea0001e2bc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78af0 head:ffffea0001e2bc00 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888012041b40 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3807, tgid 3807 (syz-executor.4), ts 149844357149, free_ts 149770609674 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] __kmalloc+0x2bd/0x370 mm/slub.c:4425 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] fib_create_info+0xa5a/0x2410 net/ipv4/fib_semantics.c:1449 fib_table_insert+0x1e5/0x1f50 net/ipv4/fib_trie.c:1236 fib_magic+0x451/0x650 net/ipv4/fib_frontend.c:1098 fib_add_ifaddr+0x143/0x5c0 net/ipv4/fib_frontend.c:1120 fib_netdev_event+0x628/0x740 net/ipv4/fib_frontend.c:1480 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 __dev_notify_flags+0x2ef/0x5d0 dev_change_flags+0xe3/0x190 net/core/dev.c:8615 do_setlink+0xef5/0x3d40 net/core/rtnetlink.c:2788 __rtnl_newlink net/core/rtnetlink.c:3547 [inline] rtnl_newlink+0x1748/0x1fa0 net/core/rtnetlink.c:3594 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3476 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] kmem_cache_alloc_node+0x1cc/0x350 mm/slub.c:3298 __alloc_skb+0xcf/0x2b0 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1265 [inline] nlmsg_new include/net/netlink.h:964 [inline] rtmsg_ifinfo_build_skb+0x81/0x180 net/core/rtnetlink.c:3905 rtmsg_ifinfo_event net/core/rtnetlink.c:3941 [inline] rtmsg_ifinfo+0x70/0x110 net/core/rtnetlink.c:3950 netdev_state_change+0x1b6/0x260 net/core/dev.c:1336 linkwatch_do_dev+0x10a/0x160 net/core/link_watch.c:168 __linkwatch_run_queue+0x474/0x730 net/core/link_watch.c:221 linkwatch_event+0x48/0x50 net/core/link_watch.c:264 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 Memory state around the buggy address: ffff888078af0980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888078af0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888078af0a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 06 ^ ffff888078af0b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888078af0b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================